I personally feel there's a good possibility that the PaD galleries get more votes because the people that the galleries belong to work harder at photography and have a more diverse gallery of pictures that people generally enjoy looking at.
The interesting thing about getting on the top of the Popular list simply by the other PaD people voting for you is that once someone has voted for you, they can't vote for your gallery again. So you'll move up to the front, then fade back real quick, then eventually if people (other than merely PaD people) continue to like and vote for you, you'll end up on the All Time list.
I think you shouldn't worry about it Angela. I think by talking people into avoiding voting for you, you're making it so the people that pick galleries by the Popular list won't find you as easily, and that's unfair to them because your gallery is EXCELLENT and it's a good thing that people can find it easily.
That's just my two cents.

You'll always find some people out there that like to spread hate. They are the minority, and they're voice doesn't need to be heard.
Keep on with the Enjoyment of Photography!
Paul Walters